Fan Nedd

Fan Nedd is a broad, flat-topped mountain in the Fforest Fawr uplands of the Brecon Beacons National Park. It stands in Powys, Wales, with its summit reaching 663 metres. A trig point marks the top, while modern and ancient cairns dot the landscape. The hill’s southern ridge slopes gently, but its northern side is steep and craggy. During the last ice age, a small glacier shaped this northern face, leaving deep hollows like Blaen Senni. Two rivers, the Nedd Fechan and Afon Llia, drain its slopes, both feeding into the River Neath and eventually reaching Swansea Bay. The hill’s geology tells a story of ancient landscapes. Its base consists of Devonian sandstones from the Old Red Sandstone period. Glacial till and peat cover much of the surface, though rock appears on the northern face. The area is part of the Fforest Fawr Geopark, recognised in 2005 for its geological significance. Walkers can explore freely, as the entire hill is open country. Most choose a path that follows the rim of the steep northern face, linking Bwlch y Duwynt to the west and a minor road near Ystradfellte and Heol Senni to the east. Visitors find wide, grassy plateaus and rugged northern cliffs shaped by ice. The trig point at the summit offers views across the Brecon Beacons. Ancient cairns on the eastern slopes hint at past travellers. Streams carve through the landscape, while the deep glacial hollow of Blaen Senni adds drama to the northern face. The contrast between gentle southern slopes and steep northern crags makes the walk both varied and rewarding. The open access means no restrictions, allowing for quiet exploration.